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Ice on the Land
Term | Definition |
---|---|
Accumulation | Inputs to the glacier budget, such as snowfall and avalanches. |
Ablation | Outputs from the glacier budget, such as melting. |
Abrasion | The process of erosion involving the wearing away of the valley floor and sides. |
Moraine | Sediment carried and deposited by the ice. |
Corrie | A deep depression on a hillside with a steep back wall, often containing a lake (tarn). |
ArĂȘte | A knife-edged ridge, often formed between two corries. |
Pyramidal Peak | A sharp-edged mountain peak. |
Glacial Trough | A wide, steep-sided valley eroded by a glacier. |
Truncated Spur | An eroded interlocking spur characterised by having a very steep cliff. |
Hanging Valley | A tributary glacial trough perched up on the side of a main valley, often marked by a waterfall. |
Lateral Moraine | A ridge of frost-shattered sediment running along the edge of a glacier where it meets the valley side. |
Medial Moraine | A ridge of sediment running down the centre of a glacier formed when two lateral moraines merge. |
Terminal Moraine | A high ridge running across the valley representing the maximum advance of a glacier. |
Drumlin | An egg-shaped hill found on the floor of a glacial trough. |